Alarm Controls Corporation MCK-4-5 Switch Plate Exit Device

Product Description

The ALARM CONTROLS CORPORATION MCK-4-5 is a switch plate assembly featuring a pneumatic time-delay mechanism and a normally closed (N/C) contact. It is designed for use in access control and door hardware applications where a timed, controlled signal is required before or after door actuation. Licensed electricians and low-voltage security technicians typically install this device as part of an exit device or push-button egress system. The pneumatic delay function allows the contact to remain in its normally closed state for an adjustable period before transitioning, giving the system time to respond appropriately to an exit request.

The MCK-4-5 is suited for commercial door control installations where a momentary switch plate is needed in conjunction with electric latch retraction or electromagnetic locking hardware. It is typically mounted at the door or adjacent wall panel as part of an egress push-button or request-to-exit station. Applications include office buildings, institutional facilities, and other commercial environments where controlled egress is required. The normally closed contact configuration makes it compatible with monitoring loops and alarm panel inputs that require a closed-circuit signal during standby.

Key Features

• Pneumatic time-delay mechanism controls the transition timing of the normally closed contact
• Normally closed (N/C) contact configuration maintains closed-circuit continuity during standby
• Switch plate format for surface or panel mounting at exit device locations
• Sold individually as a single unit for targeted replacement or new installation
• Categorized as an exit device and push-button component for access control systems

Compatibility

Designed as an OEM-style component for use in commercial access control and exit device systems requiring a pneumatic-delay normally closed switch plate.

Installation Notes

Installation should be performed by a licensed electrician or certified low-voltage technician familiar with access control and egress hardware. Disconnect and de-energize all associated power supplies and locking devices before beginning installation or wiring. Follow applicable local electrical codes and NFPA 101 Life Safety Code requirements for egress hardware in commercial occupancies. Verify contact configuration and delay timing are appropriate for the connected alarm or access control panel before returning the system to service.